export function isFormData(v) {
  return Object.prototype.toString.call(v) === '[object FormData]'
}

export function isFunction(v) {
  return Object.prototype.toString.call(v) === '[object Function]'
}

export function isObject(v) {
  return Object.prototype.toString.call(v) === '[object Object]'
}

export function isString(v) {
  return Object.prototype.toString.call(v) === '[object String]'
}

export function isArray(v) {
  return Object.prototype.toString.call(v) === '[object Array]'
}